Forum Post: RE: Find duplicate startdate on a Form

I triied on the beginDate-onvalidate, like this: BeginDate - OnValidate() SetDates(Rec, StartDate2, EndDate2, Regelkorting); Rec.SETRANGE(StartDate2,BOM.StartDate2,BOM.StartDate2); IF Rec.COUNT > 1 THEN ERROR('Number already exists ');